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Analysis method of water permeability efficiency of permeable concrete based on sinking index

A technology of permeable concrete and analysis method, applied in the direction of permeability/surface area analysis, suspension and porous material analysis, measuring device, etc., can solve the problems of destroying the uniformity of permeable concrete, reducing the permeable efficiency of permeable concrete, complex process, etc., to achieve The effect of good engineering application prospect and promotion value

Active Publication Date: 2019-12-10
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during the construction of pervious concrete, the slurry is easy to separate from the aggregate and accumulate together, destroying the uniformity of the permeable concrete and forming an impermeable layer at the bottom
If the uniformity of the pervious concrete is not good, even if it has a high void ratio, the permeable efficiency of the pervious concrete will be greatly reduced
In actual engineering, the process of measuring the water permeability coefficient of pervious concrete is complicated and requires the use of special instruments, and the water permeability coefficient of permeable concrete can only reflect the water permeability effect of permeable concrete. The improvement provides a quantitative indicator basis

Method used

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  • Analysis method of water permeability efficiency of permeable concrete based on sinking index
  • Analysis method of water permeability efficiency of permeable concrete based on sinking index
  • Analysis method of water permeability efficiency of permeable concrete based on sinking index

Examples

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Comparison scheme
Effect test

Embodiment 1

[0042] An example of the water permeable efficiency analysis method of permeable concrete based on the slurry index of the present invention comprises the following steps:

[0043] 1. Specimen section preparation and image acquisition

[0044] Obtain the standard specimen 1 for permeable concrete sinking analysis, cut the specimen vertically on the top surface; clean the cut section, and apply a single color on the entire section, so that there is obvious color difference between the void area and the dense area on the section; obtained by shooting The digital image of the section of specimen 1, such as figure 1 shown.

[0045] 2. Obtain the filling rate layer by layer

[0046] use The R2014b numerical analysis software performs binary processing on the picture to obtain a black and white binary picture, such as figure 2 shown. Divide the cross-section of the slurry analysis standard test piece 1 into 8 layers evenly, so that the cross-section of the test piece forms 8 ...

Embodiment 2

[0076] Another example of the permeable concrete water permeability efficiency analysis method based on the slurry index of the present invention includes the following steps:

[0077] 1. Specimen section preparation and image acquisition

[0078] Obtain the standard specimen 2 for permeable concrete sinking analysis, cut the specimen vertically on the top surface; clean the section after cutting, and apply a single color on the entire section, so that there is obvious color difference between the void area and the dense area on the section; obtained by shooting The digital image of the section of specimen 1, such as Figure 4 shown.

[0079] 2. Obtain the filling rate layer by layer

[0080] use The R2014b numerical analysis software performs binary processing on the picture to obtain a black and white binary picture, such as Figure 5 shown. Divide the cross-section of the slurry analysis standard specimen 2 into 8 layers evenly, so that the cross-section of the specim...

Embodiment 3

[0109] A verification example of the water permeable efficiency analysis method of permeable concrete based on the slurry index of the present invention includes the following steps:

[0110] 1. Specimen section preparation and image acquisition

[0111] In this embodiment, in order to verify the effectiveness of the method, the digital image of the cross-section of the slurry analysis standard specimen 2 obtained in embodiment 2 is still analyzed.

[0112] 2. Obtain the filling rate layer by layer

[0113] Divide the cross-section of the slurry analysis standard specimen 2 evenly into 12 layers, so that the cross-section of the specimen forms 12 regions parallel to the top surface, such as Figure 7 shown. use R2014b numerical analysis software counts the number of white pixels layer by layer, and the proportion of white pixels is the filling rate, and the filling rate c of each area from the top surface to the bottom surface is obtained 1 to c 12 0.4703, 0.4406, 0.4505...

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Abstract

The invention relates to a method based on a slurry precipitation index and used for analyzing the water permeation efficiency of pervious concrete. The method includes the steps of firstly, preparinga test piece section, and acquiring an image; secondly, acquiring filling rate layer by layer; thirdly, analyzing bidirectional accumulated filling rate; fourthly, calculating the slurry precipitation index; fifthly, calculating filling uniform growth rate, and analyzing the water permeation efficiency. The method has the advantages that the filling rate of the pervious concrete is calculated layer by layer, the slurry precipitation index is acquired through quantitative calculation, the quantitative characterization of the water permeability change, from the top surface to the bottom surface, of the pervious concrete, a quantitative approach is provided for the evaluation of the water permeation efficiency of the pervious concrete, the defects that a traditional method can only measure awater permeation coefficient and is hard to objectively evaluate the water permeation efficiency are overcome, and the method is promising in engineering application prospect and worthy of popularization.

Description

technical field [0001] The invention relates to a method for analyzing building materials, in particular to a method for analyzing the water permeability efficiency of permeable concrete based on the sinking index. Background technique [0002] Permeable concrete is a kind of concrete with continuous pores. The coarse aggregate is wrapped by cement paste to form a coarse skeleton-void structure. Therefore, the permeable concrete paste requires high cohesion and low fluidity. [0003] The performance of pervious concrete is usually characterized by void ratio and water permeability coefficient. At present, the method of measuring the porosity of permeable concrete is the immersion weighing method, which is to soak the permeable concrete test block in water, measure the quality in water and take out the mass after drying in the air for 24 hours, and calculate the porosity. The constant water head test method is usually used to measure the water permeability coefficient of per...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08
CPCG01N15/08
Inventor 陈正邓鹏梁凯胡以婵冯庆革余波陈晔
Owner GUANGXI UNIV
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